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| Class: Aves (What does it contain?) |
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| Scales and amniotic eggs are characterictis of which class(es)? |
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| what are aves adaptions for flight? |
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| front limbs modified for wings, honeycombed bone (hollow & filled with air for flying) and feathers with modified scales made of keratin (same as reptiles) |
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| how many ovaries do birds have? |
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| are birds endo- or exo- thermic? |
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| how many chambers does a birds heart have? |
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| what are birds hind limbs adapted for? |
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| perching, hopping, swimming, ect |
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| Birds are_____. instead they have jaws covered by a horny___. |
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| Describe a birds digestion. |
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| Food is stored in the crop before moving to the 1st chamber (proventriculus) where food is mixed and then to the 2nd chamber(gizzard) where food is ground |
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| Where is waste excreted from in a bird? |
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| Discribe the respiration of birds. |
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| Air passes through the trachea into a pair of tubes called bronchi, which lead to lungs. Much of the inhaled air travels into air sacs (cavities filled with air that make bird lighter). |
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| what do birds use to make calls? |
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| what are the 3 major brain areas? |
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Cerebellum: controls flying and walking;
Midbrain tectum: (optic lobes) for vision;
Cerebrum: control center for complex patterns of behavior (eating, mating, nest building, care of young), learning, and voluntary muscles. |
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| Feathers grow from small sacs in skin called ________ |
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| The ___________ is central cylinder running length of feather |
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| The hollow section of the rachis is the ____________. |
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| ________, the branches of rachis, are linked together by small lateral projections called _____________ |
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| Several barbs hooked together by barbules form a ________ |
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| __________located at the base of the tail; secretes oil that birds spread over their feathers for waterproofing |
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| what are the 4 types of feathers? |
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Contour: smooth, sleek feathers that cover the head, body, and wings. They protect and streamline bird. Contour feathers of wing and tail are large and called quill feathers.
Down: soft, fluffy feathers found under contour feathers. They insulate the newly hatched bird. They do not have rachis and barbules (lack hooks).
Filoplumes/Pin: short, thin feathers that look like hair and give added insulation.
Bristles: short and hair-like; located near the bird’s nostril and filter dust. |
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| what is the process that birds go through to be born? |
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Internal fertilization.
Sperm pass through vas deferens.
After mating, fertilized eggs enters oviduct which leads to cloaca.
As eggs travel through oviduct they pick up albumin, protein that makes up egg white. Later eggs covered by shell (amniotic egg) and then leave cloaca.
Chick uses egg tooth to hatch its way out of egg and then loses egg tooth after few days. |
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